We look at the division of 851842 by 42 
We want to divide 851842 by 42.

Let's proceed to step 1:
When dividing 8 by 42, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 42

Going ahead to step 2:
42 can be fit into 85 2 times, resulting in a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 84 from 85, we get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 42

Step 3:
When dividing 11 by 42, we get 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 20.0
Subtracting 0 from 11 leaves us with 11.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 42

Moving on to step 4:
42 goes into 118 2 times with a remainder of 34.
Use 2 as the next digit of our solution. 
Result so far: 202.0
If we subtract 84 from 118, we get 34.
Append the next digit (4) from the dividend to 34 and continue with: 344 / 42

Moving on to step 5:
If we divide 344 by 42, we get 8 and a remainder of 8.
The next digit of our result is 8. 
Result so far: 2028.0
Deduct 336 from 344 and we're left with 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 42

Going ahead to step 6:
42 goes into 82 1 times with a remainder of 40.
Write down 1 as next digit of the result. 
Result so far: 20281.0
Deduct 42 from 82 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 7:
The number 42 fits into 400 9 times, leaving a remainder of 22.
Use 9 as the next digit of our solution. 
Result so far: 20281.9
Subtracting 378 from 400 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 8:
When dividing 220 by 42, we get 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 20281.95
Subtract 210 from 220 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
42 goes into 100 2 times with a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 20281.952
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
42 goes into 160 3 times with a remainder of 34.
The next digit of our result is 3. 
Result so far: 20281.9523
Subtracting 126 from 160 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 11:
340 divided by 42 is 8 with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 20281.95238
If we take 336 away from 340, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
42 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 20281.95238
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 13:
42 can be fit into 400 9 times, resulting in a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 20281.9523809
The remainder is 22 after subtracting 378 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 14:
When dividing 220 by 42, we get 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 20281.95238095
Subtracting 210 from 220 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 20281.95238095 and a remainder of 1e-08.